Topic: Manufacturing Processes
Weld decay in stainless steel is due to
- A. Depletion of Chromium at heat affected zone
- B. Depletion of Titanium in the weld
- C. Both (a) and (b)
- D. None of the above
Answer: A. Depletion of Chromium at heat affected zone
Explanation: Weld decay is a form of intergranular corrosion in austenitic stainless steels. During welding, the heat-affected zone (HAZ) reaches a sensitizing temperature range, causing chromium to combine with carbon to form chromium carbides at the grain boundaries. This depletes the adjacent areas of chromium, reducing corrosion resistance.